• 专利标题:   Constructing carbon specific hybridization bond useful for preparing various unnatural beta-aryl amino acids, comprises directly coupling the amino acid beta-carbon and ring carbon where phenolic hydroxy group is located to construct carbon-carbon bond.
  • 专利号:   CN113527121-A, CN113527121-B
  • 发明人:   LI A, HUANG J, TIAN X, LI X, LIU S, FAN S
  • 专利权人:   UNIV HEBEI SCI TECHNOLOGY
  • 国际专利分类:   C07C227/16, C07C229/36, C07C253/30, C07C255/58, C07C319/20, C07C323/63, C07D207/16, C07D311/30, C07J041/00
  • 专利详细信息:   CN113527121-A 22 Oct 2021 C07C-229/36 202214 Chinese
  • 申请详细信息:   CN113527121-A CN10640795 09 Jun 2021
  • 优先权号:   CN10640795

▎ 摘  要

NOVELTY - Constructing C(sp3)-C(sp2) bond, comprises directly coupling the amino acid beta-C(sp3) and ring carbon C(sp2) where phenolic hydroxy group is located to construct carbon-carbon bond. USE - The C(sp3)-C(sp2) bond is useful for preparing various unnatural beta-aryl amino acids (claimed). ADVANTAGE - The method has simple operation, low cost, strong reaction versatility, and high yield and stereoselectivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing beta-aryl amino acids of formula (V) comprising dissolving purified amino acid beta-arylation product (II) in 0.5-2 N mineral acid aqueous solution, and hydrolyzing under the assistance of 25 W microwave, then it is neutralizing with aqueous sodium hydroxide solution, extracting with ethyl acetate to recover the ligand L1, concentrating aqueous phase, and recrystallizing residue to obtain beta-aryl amino acid, where mineral acids include hydrochloric acid, sulfuric acid, nitric acid, and potassium hydrogen sulfate.